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METHOD FOR EXTRACTING RARE EARTH ELEMENTS FROM SOLID MINERAL AND/OR MAN-MADE MATERIALS 发明申请

2023-02-02 3420 228K 0

专利信息

申请日期 2025-07-09 申请号 RU2012147893
公开(公告)号 RU2012147893A 公开(公告)日 2014-05-20
公开国别 RU 申请人省市代码 全国
申请人 Закрытое акционерное общество "Твин Трейдинг Компани"
简介 The invention relates to the technology of recovery of rare-earth elements form both solid fossil and technology-related materials obtained by means of their target-oriented processing. Rare-earth elements recovery method include the acid leaching of ground to less than 100 µm solid fossil and technology-related materials with the mixture of sulphuric and nitric acid at ratio from 6 : 1 to 1 : 1 mass parts, at the concentration in mixture of acids less than 15 wt.% at liquid/solid phases ratio (L : S) from 2 : 1 to 6 : 1 mass parts. During the leaching operation progress the vacuum-impulse action is conducted during all operation of transferring of rare-earth elements compounds into a solution and obtaining of a precipitate of remained solid fossil and technology-related materials. The obtained precipitate of solid fossil and technology-related materials is separated from leaching solution. Separation of rare-earth elements from leaching solution is conducted using ion-exchange filter or membrane filter. When simplifying the method, the recovery rate of rare-earth elements both from phosphogypsum and solid fossil containing rare-earth elements into a solution increases.


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